"This dictionary contains 1302 terms in the field of gemology, especially those related species gemmològiques, physical properties and characteristics of crystalline gems, inclusions and sizes. Also includes materials obtained in laboratory treatments used to improve the color and appearance of the gems, carving processes, machines and tools necessary to do it and end products that result, and measuring devices and accessories used in various analytical techniques. Each article contains the names in Catalan, equivalents in Spanish, French, Italian, English and German, and definition. This is the online version of the dictionary gemology, published by TERMCAT and Editions University of Barcelona in 1999, prepared under the direction and coordination of scientific Joaquim M. Nogués, with terminology coordination TERMCAT. This edition or can first consult thematic data dictionary and incorporates specific amendments with respect to the paper version, the result of the maintenance of updated data carried out by TERMCAT. "